derek.holloway
7502bf64a4
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101 lines
4.2 KiB
ArmAsm
101 lines
4.2 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv5-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2 --shared
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0x70000c --stop-address=0x700010 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0x80000c --stop-address=0x800010 -d %t2 | FileCheck %s --check-prefix=CHECK-CALL
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0xd00020 --stop-address=0xd00060 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s --check-prefix=CHECK-PLT
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv5eb-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2 --shared
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0x70000c --stop-address=0x700010 --triple=armv5eb-none-linux-gnueabi -d %t2 | FileCheck %s
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0x80000c --stop-address=0x800010 -d %t2 | FileCheck %s --check-prefix=CHECK-CALL
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// RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn --start-address=0xd00020 --stop-address=0xd00060 --triple=armv5eb-none-linux-gnueabi -d %t2 | FileCheck %s --check-prefix=CHECK-PLT
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/// When we create a thunk to a PLT entry the relocation is redirected to the
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/// Thunk, changing its expression to a non-PLT equivalent. If the thunk
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/// becomes unusable we need to restore the relocation expression to the PLT
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/// form so that when we create a new thunk it targets the PLT.
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/// Test case that checks the case:
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/// - Thunk is created on pass 1 to a PLT entry for preemptible
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/// - Some other Thunk added in the same pass moves the thunk to
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/// preemptible out of range of its caller.
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/// - New Thunk is created on pass 2 to PLT entry for preemptible
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.globl preemptible
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.globl preemptible2
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.section .text.01, "ax", %progbits
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.balign 0x100000
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.thumb
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.globl needsplt
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.type needsplt, %function
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needsplt:
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bl preemptible
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.section .text.02, "ax", %progbits
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.space (1024 * 1024)
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.section .text.03, "ax", %progbits
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.space (1024 * 1024)
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.section .text.04, "ax", %progbits
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.space (1024 * 1024)
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.section .text.05, "ax", %progbits
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.space (1024 * 1024)
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.section .text.06, "ax", %progbits
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.space (1024 * 1024)
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.section .text.07, "ax", %progbits
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.space (1024 * 1024)
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/// 0xd00040 = preemptible@plt
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// CHECK: 0070000c <__ARMv4PILongBXThunk_preemptible>:
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// CHECK-NEXT: 70000c: b 0xd00040
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.section .text.08, "ax", %progbits
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.space (1024 * 1024) - 4
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.section .text.10, "ax", %progbits
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.balign 2
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bl preemptible
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bl preemptible2
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// CHECK-CALL: 80000c: blx 0x70000c <__ARMv4PILongBXThunk_preemptible>
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.balign 2
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.globl preemptible
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.type preemptible, %function
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preemptible:
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bx lr
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.globl preemptible2
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.type preemptible2, %function
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preemptible2:
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bx lr
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.section .text.11, "ax", %progbits
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.space (5 * 1024 * 1024)
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// CHECK-PLT: Disassembly of section .plt:
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// CHECK-PLT-EMPTY:
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// CHECK-PLT-NEXT: 00d00020 <.plt>:
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// CHECK-PLT-NEXT: d00020: str lr, [sp, #-4]!
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// CHECK-PLT-NEXT: add lr, pc, #0, #12
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// CHECK-PLT-NEXT: add lr, lr, #32, #20
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// CHECK-PLT-NEXT: ldr pc, [lr, #148]!
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// CHECK-PLT-NEXT: d00030: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d00034: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d00038: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d0003c: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-EMPTY:
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// CHECK-PLT-NEXT: <preemptible@plt>:
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// CHECK-PLT-NEXT: d00040: add r12, pc, #0, #12
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// CHECK-PLT-NEXT: d00044: add r12, r12, #32, #20
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// CHECK-PLT-NEXT: d00048: ldr pc, [r12, #124]!
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// CHECK-PLT-NEXT: d0004c: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-EMPTY:
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// CHECK-PLT-NEXT: <preemptible2@plt>:
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// CHECK-PLT-NEXT: d00050: add r12, pc, #0, #12
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// CHECK-PLT-NEXT: d00054: add r12, r12, #32, #20
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// CHECK-PLT-NEXT: d00058: ldr pc, [r12, #112]!
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// CHECK-PLT-NEXT: d0005c: d4 d4 d4 d4 .word 0xd4d4d4d4
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